I've been to NYC many times and l'll never drive my NSX there. Getting in and out of traffic with the NSX makes you seem classless when you have to compete with the Yellows. Besides, I haven't seen a parking garage in NYC that is not valet. They always have a warning sign saying, "We are not responsible for exterior damages, blah blah blah..." and IMHO, that is not safe at all.
I assume you're posting this thread because you're thinking of where to park the car the night before the wedding. If I were you, I'll kindly ask the folks at the River run if any of them has a spare car you can borrow for a day while leaving your car there. Bring the car back the next, hop back in your NSX and on your way home!!